The romance between a lonely college student and who seems to be the girl of his dreams is burdened by the sudden arrival of cruel fate.
Hana is a normal high school student, unsatisfied in her daily life. One day she had a dream and met a 10-year-old girl living in Sengoku Era. The girl lives hard with poverty and misfortune in that world and the two are going to have a sisterhood friendship. When Hana wakes up, she is taken away by the government special agency and subject to severe scrutiny about her dream. There is something called Akashic Record and the destinies of all humans follow that record. And the future record of all mankind is gone in a month. The key to solving the problem is the girl who appeared in Hana's dream.
Saijo has an ability to see special glow around women who are in love. Kitashiro, his childhood friend, the only person that knows about his ability, has had a crush on him most of her life, but Saijo tells her that she doesn't emit light around him which leaves her at a loss. Meanwhile, their classmate Yadorigi, who has a habit of liking guys belonging to other women, mistakes Saijo as Kitashiro' s boyfriend and makes a move on him. One day, Saijo accidentally sees a notebook that belongs to Shinonome, a girl who is trying to explore the meaning of love. They start an exchange diary to discuss the topic, but Kitashiro feels uncomfortable watching them deepen their relationship. And when Yadorigi sees this, she decides that she too wants to start an exchange diary with them.
Umi’s hearing is so sensitive that even notes played slightly out-of-tune give her a headache. Violinist Yuko arrives from Tokyo to play a concert on Umi’s small island near Okinawa, and gradually befriends the girl. Both struggle with friendships and family relationships, but are brought together by music.
Five years have passed since the events of Sadako 3D. Akane is pregnant with a child with her boyfriend Takenori. However, Akane dies after giving birth to her daughter. When Takenori's sister Fuko takes up the task of caring for Akane's daughter, the infamous cursed video resurfaces. During her investigation, Fuko learns about the legend of Sadako's daughter...